What are the standard sizing conventions for sunglasses?

We recommend having your favorite, most baller pair of sunglasses, ideally a category 2 or cat 3 pair for day time running. If you're in an extremely exposed, ... Lightweight but super strong TR90 frame. Impact resistant & shatterproof polycarbonate lenses. Full wrap fit to keep out wind, glare & UVR. ... rated as category 3 for superior sun glare reduction. Read more. - +. Add to basket. £30.00. In stock. More details. Material, Bio-Plastic. Dimensions, 6 x 14 x ... It is the most trendy frame in our collection Made from plants, this sunglass features category 3 polarized lenses. Add to cart · View ... When to wear sunglasses? Wear sunglasses outdoors, particularly: During summer. The level of UVR at noon in summer can be more than three times higher than in ... Jul 15, 2019 ... The lens tint can vary from a light tint in Category 1 to a dark tint in Category 3 sunglasses, and a very dark tint in Category 4 sunglasses. Click & Collect ... Our optical engineers developed these sunglasses for hiking. Ideal for occasional use in the mountains. Experience optimal eye protection with ... Get a head start with Horizon, our Category 3 speed glasses designed for performance. Sharpened design, maximum vision, UV protection: ... Category 3 to 3 in mineral lens. Category 2 to 3 in PhD™ 2.0 lens. Very bright light conditions. The non-polarized lens is ideal for Driving and Everyday ... Our optical engineers developed these sunglasses for hiking. Ideal for occasional use in the mountains thanks to their lightness.